Invalid lowering of llvm.*.f128 intrinsics #44744
Description
| Bugzilla Link | 45399 |
| Version | trunk |
| OS | Linux |
Extended Description
llvm.sin.f128 is incorrectly lowered to a call to sinl, which takes a f80: https://godbolt.org/z/M9fjLW
define fp128 @​bad_lowering(fp128 %a) { %s = call fp128 @​llvm.sin.f128(fp128 %a) ret fp128 %s } generates:
bad_lowering: jmp sinl which is missing conversions from and to x86_fp80.
I expect a correct lowering to be:
define fp128 @​manual_correct_lowering(fp128 %a) { %t = fptrunc fp128 %a to x86_fp80 %s = call x86_fp80 @​llvm.sin.f80(x86_fp80 %t) %e = fpext x86_fp80 %s to fp128 ret fp128 %e } manual_correct_lowering: subq $24, %rsp callq __trunctfxf2 fstpt (%rsp) callq sinl fstpt (%rsp) callq __extendxftf2 addq $24, %rsp retq